Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdb00094ca4372707c1c309fb80207b7c97af7e3babc5f7915148782fd37c1cf' 
  AND token = 'I2KBE5NI6YnQDk6B/OT/4KhjRPXbo/UZAVLQcw4SMC4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}